CN106525526B - A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate - Google Patents
A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate Download PDFInfo
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- CN106525526B CN106525526B CN201610949294.1A CN201610949294A CN106525526B CN 106525526 B CN106525526 B CN 106525526B CN 201610949294 A CN201610949294 A CN 201610949294A CN 106525526 B CN106525526 B CN 106525526B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
Abstract
The invention discloses a kind of high pressure water injection of raw coal containing gas and the measuring methods of radial gas permeation rate, belong to prevention and control of mine disaster technical field.Water injection hole is drilled down at the top center of cylindric sample of this method first after selection and cutting, and water filling floral tube is installed in the water injection hole, two end part seals of floral tube will be filled the water, it is placed in cyclic annular permeation cylinder, in the pedestal joints cement of cyclic annular permeation cylinder, permeability cell is installed between its inner wall and column sample, joints cement in the gap formed to casing wall and column sample, platen is installed at the top of column sample, after theing cement solidifies in cyclic annular permeation cylinder, support rod is taken out, raw coal sample is obtained；Then the raw coal sample is placed in experimental tank body, is cooperated by cover pressure loading system, high pressure water injection system etc. for being connect with experiment tank body, the permeability of the high pressure water enchroachment (invasion) sample of raw coal containing gas is finally calculated.The method of the present invention provides scientific guidance for coal-bed flooding technology prevention Coal Mine Disasters.
Description
Technical field
The invention belongs to prevention and control of mine disaster technical fields, and in particular to a kind of high pressure water injection and radial gas porous flow experiment
The measuring method of method more particularly to a kind of high pressure water injection of raw coal containing gas and radial gas permeation rate.
Background technique
In recent years, with the increase of coal mining depth, in recovery process, the disasters such as gas, fire, dust and water are increasingly
Seriously, take precautions against natural calamities effect to improve coal mine, China generally use coal-bed flooding technology carry out the comprehensive disaster of coal mine (gas, dust,
Bump) improvement.Currently, it is larger by the difficulty that coal-bed flooding fundamental research is carried out in field experiment, it needs to test
Room is tested to simulate coal-bed flooding dynamic process under truth, because raw coal sample preparation is complicated and not easily molded, and type
Coal has many advantages, such as that shape-plastic is high, particle is uniform, property is homogenized and is widely adopted, therefore tests coal sample used at present and be mostly
Moulded coal sample simulates true coal using raw coal sample even if testing using the Mono direct percolation that raw coal sample is also mostly gas or water
The Radial Flow Through Porous Media experiment of layer water filling dynamic process is rarely reported.
It is well known that coal is Anisotropic Porous Media, inside development has the network seepages knot such as primary joint, mining induced fissure
Structure, and moulded coal sample does not have the function of simulating this structure, while moulded coal sample also can not really reflect raw coal mechanical characteristic,
Expected experimental result is unable to get to instruct the application of site technology.
Summary of the invention
For above-mentioned defect existing in the prior art, one of task of the invention is to provide a kind of production of raw coal sample
Method, it overcomes the defects of raw coal production is not easily molded in the prior art, raw coal sample provided by the invention, after can satisfy
The progress of continuous water filling and radial gas porous flow experiment, provides scientific guidance for coal-bed flooding technology prevention Coal Mine Disasters.
Its technical solution includes:
A kind of production method of raw coal sample, successively the following steps are included:
A is used as experiment coal sample along the cube coal sample that coal working face chooses certain size, and the experiment coal sample is cut
It polishes at the column sample of certain size, and to its surface, drills through note from top to bottom at the column sample center
Water filling floral tube is installed in water hole in the water injection hole, by two end part seals of the water filling floral tube；
The column sample for being installed on water filling floral tube is placed in cyclic annular permeation cylinder by b, is poured in the pedestal of cyclic annular permeation cylinder
Cement is built, permeability cell is installed between its inner wall and column sample, the permeability cell is by penetrating cyclic annular permeation cylinder casing wall
Support rod is fixed, joints cement in the gap formed to the cyclic annular permeation cylinder casing wall and the column sample, until covering
Until the certain thickness of sample top surface, platen is installed at the top of the column sample；
C takes out the support rod to get raw coal sample after theing cement solidifies in cyclic annular permeation cylinder.
As a preferred solution of the present invention, the size of the column sample is 300 × h50mm of Φ, the water filling
Bore dia is 10mm.
Another task of the invention is to provide the measurement side of a kind of high pressure water injection of raw coal containing gas and radial gas permeation rate
Method, wherein raw coal sample is raw coal sample obtained by above-mentioned preparation, passes through the high pressure water injection of raw coal containing gas and radial gas porous flow
Experiment, can disclose the power Water Invasion Characteristics of raw coal containing gas and coal-water-strength mechanism of action；And by being sliced to raw coal test specimen
Observe and non-linear fractals combined to analyze, can improve raw coal containing gas under power water enchroachment (invasion) it is macro-microscopical structure in water infiltration
Property with fractal structure relationship, and obtain external macroparameter (covering pressure, gas pressure) to the affecting laws of permeability fractal model.
A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate, comprising the following steps:
Step 1: preparing experiment system, the experimental system includes experiment tank body, covers pressure loading system, high pressure water injection system
It unites, vacuumize-gas injection system, data monitoring system and data collection system, the experiment tank body includes tank ontology, in the tank
The surrounding of ontology is provided with air inlet, water inlet, gas outlet and pressure transmitter interface, is provided with ring-type in the tank ontology
Permeation cylinder, the ring-type permeation cylinder is closely embedded in tank inner body wall, and communicates with the air inlet, in the ring-type permeation cylinder
The raw coal sample being prepared such as claims 1 or 2 is placed, platen, the platen top are placed above the raw coal sample
T-type piston is installed, the sealing cover body for sealing to the tank ontology is installed above the T-type piston；It is described to cover pressure load system
System is connect with the sealing cover body, and the high pressure water injection system is connect by pipeline with the water inlet, described to vacuumize-gas injection
System is connect by pipeline with the air inlet, and the pressure transmitter interface is connected to the data monitoring system；The number
It include gas collecting apparatus according to acquisition system, the gas collecting apparatus is connect by pipeline with the air inlet；
Step 2: by vacuumize-gas injection system injects Ar into the tank ontology, and turn-on data monitors system, inspection
The air-tightness for surveying experimental system, closes after air-tightness is good and vacuumizes-gas injection system；
Step 3: pressure loading system is covered in starting, the raw coal sample in cyclic annular permeation cylinder is carried out to cover pressure load, passes through area
Pressure is covered than calculating the carrying of raw coal sample, and coal seam is original covers pressure for correspondence；
Step 4: starting vacuumizes-gas injection system, first tank ontology is vacuumized, then reinjects methane, and keep
Pressure constant state, after raw coal sample equilibrium adsorption 8h, closing vacuumizes-gas injection system；
It is filled the water Step 5: opening high pressure water injection system into tank ontology, after coal seam with gas high pressure water enchroachment (invasion) experiment to be done,
Close high pressure water injection system, open at this time vacuumize-gas injection system injects methane into tank ontology, and keeps pressure constant state,
Gas and water competitive Adsorption in the raw coal sample, balance 8h；
Step 6: turn-on data acquisition system, methane is through the raw coal sample Radial Flow Through Porous Media to filling the water floral tube, seepage flow initial stage
For gas and water coexisting state, wait be full gaseity, and after gas flow stabilization, read test is as a result, calculate high pressure according to formula (1)
The permeability of the water enchroachment (invasion) sample of raw coal containing gas:
In formula: K is the permeability of coal sample, and mD, μ are gas viscosity, p0For the atmospheric pressure in laboratory, Pa；Q0For gas stream
Amount, ml/s；pw、peRespectively inner and outer boundary pressure, MPa；rw、reRespectively inner and outer boundary radius, cm；H is raw coal thickness, cm.
Preferably, the pressure loading system of covering includes electro-hydraulic servo control oil pressure pump, passes through the electro-hydraulic servo control oil
Press pump applies pressure to T-type piston, to complete to cover pressure load to raw coal sample.
Preferably, mass flowmenter, the data monitoring system are additionally provided on the pipeline connecting with the gas collecting apparatus
Including computer and data collector, the data collector passes through pressure transmitter interface and mass flow described in connection
Meter.
Preferably, described vacuumize-gas injection system includes vacuum pump, pressure reducing valve, methane steel cylinder and Ar steel cylinder, the methane
Steel cylinder and Ar steel cylinder are connected on the gas injection port by pipeline, and the vacuum pump and pressure reducing valve are installed in methane steel cylinder and gas injection
On pipeline between mouthful.
Advantageous effects brought by the present invention:
Firstly, the raw coal sample that the present invention is prepared overcome moulded coal sample commonly used in the prior art can not complete mould
The defect of quasi- raw coal mechanical characteristic, pore structure, it is not easily molded etc. the present invention overcomes it in the production method of raw coal sample
Technological deficiency, the raw coal sample being prepared by the method for the invention more meet following injected water and radial gas porous flow experiment
Progress, the raw coal sample that the present invention is prepared can really reflect raw coal mechanical characteristic；
Secondly, using above-mentioned preparation in the measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate
Obtained raw coal sample, the measuring method can disclose the power Water Invasion Characteristics of raw coal containing gas and coal-water-strength mechanism of action；
And the analysis of non-linear fractals is observed and combines by being sliced to raw coal test specimen, raw coal containing gas under power water enchroachment (invasion) can be improved
The permeability of water and fractal structure relationship in macro-microscopical structure, and external macroparameter (covering pressure, gas pressure) is obtained to infiltration
The affecting laws of rate fractal model；Meanwhile based on principle of effective stress, Binding experiment analysis can be under construction force water enchroachment (invasion)
The microcosmic adsorption swelling of raw coal gas and macroscopical seepage flow Coupling Dynamic Model, prevent and treat coal and gas prominent accident for coal-bed flooding and mention
For scientific basis and theoretical direction；
Finally, passing through experimental tank in the measurement experiment system of the high pressure water injection of raw coal containing gas and radial gas permeation rate
Body, cover pressure loading system, high pressure water injection system, vacuumize-gas injection system, data monitoring system and data collection system it is mutual
Cooperation is, it can be achieved that automation control, facilitates operation.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is the measurement experiment system schematic of the high pressure water injection of raw coal containing gas of the invention and radial gas permeation rate；
Fig. 2 is the A-A diagrammatic cross-section that tank body is tested in Fig. 1；
Fig. 3 is raw coal sample preparation schematic diagram of the present invention；
Wherein, 1- electro-hydraulic servo control oil pressure pump, 2- test tank body, 3- mass flowmenter, 4- high pressure water-injection pump, 5- gas collection
Device, the pond 6-, 7- computer, 8- data collector, 9- vacuum pump, 10- pressure reducing valve, 11- methane steel cylinder, 12- nut, 13- connect
Acting flange, 14-T type piston, 15-O type sealing ring, 16- air inlet, 17- pressure transmitter, 18- tank ontology, 19- platen, 20-
Water filling floral tube, 21- ring-type permeation cylinder, 22- water inlet/gas outlet, 23- column sample, 24- silica gel, 25- cement, 26- are ventilative
Pipe, 27- cement, 28- raw coal sample, 29- support rod, 30- air inlet pipe.
Specific embodiment
It elaborates combined with specific embodiments below to the present invention.
As shown in figure 3, the production method of raw coal sample of the present invention, specifically includes the following steps:
A, live, integrality preferable region clear along coal working face selection stratification carries out channeling sampling, having a size of 400
Laboratory is sent in the cube of × 400 × 400mm, sealing, chooses 4 class of high and low hardness and high and low porosity of China Typical Mining
Coal sample is as experiment coal sample；
B, cutting machine is prepared into the column sample 23 of 300 × h50mm of Φ, and cylindrical surface is along stratification and vertical stratification direction point
Two class samples are made, polish its surface, cylindrical center drills through Φ 10mm water injection hole, installs water filling floral tube 20, water filling flower
20 both ends of pipe are sealed with column sample 23 by silica gel 24, and water filling 20 lower end of floral tube is connected to tank sheet using O-ring seal 15
The chassis of body 18, and be connected and sealed；
C, column sample 23 is installed in cyclic annular permeation cylinder 21, in cyclic annular 21 pedestal joints cement 25 of permeation cylinder,
Install permeability cell 26 between cyclic annular 21 casing wall of permeation cylinder and sample, permeability cell 26 is by penetrating the branch of cyclic annular permeation cylinder casing wall aperture
Strut 29 is fixed, the space joints cement 27 between Xiang Huanzhuan permeation cylinder casing wall and sample, until covering column sample top surface
Certain thickness then installs platen 19 at the top of the column sample, and close by O-ring seal 15 and cyclic annular permeation cylinder 21
Envelope；
D, after theing cement solidifies 48 hours, the support rod 29 in cyclic annular 21 casing wall aperture of permeation cylinder is taken out, it is as molding
Raw coal sample 28 carries out subsequent experimental again after being dried in vacuo.
The above-mentioned raw coal sample being prepared is used in the high pressure water injection of raw coal containing gas and radial gas porous flow experiment, tool
Experimental system used by the experiment of body referring to figs. 1 and 2, including tests tank body 2, covers pressure loading system, high pressure injection
Water system vacuumizes-gas injection system, data monitoring system and data collection system；Specifically, experiment tank body 2 includes tank ontology
18, the surrounding of tank ontology 18 is provided with air inlet 16,17 interface of water inlet 22, gas outlet 22 and pressure transmitter, air inlet
Air inlet pipe 30 is connected at 16, cyclic annular permeation cylinder 21 is provided in tank ontology 18, and cyclic annular permeation cylinder 21 is closely embedded in tank ontology
18 inner walls, and communicated with air inlet 16, the raw coal sample 28 being prepared is placed in cyclic annular permeation cylinder, above raw coal sample
Platen 19 is placed, T-type piston 14 is installed above platen, the sealing cover body for sealing to tank ontology is installed above T-type piston 14,
Such as connecting flange 13, tank ontology is sealed by 13 attaching nut 12 of connecting flange, the water filling floral tube in raw coal sample 28
20 are connected by internal duct with water inlet/gas outlet 22.
Pressure loading system, including electro-hydraulic servo control oil pressure pump 1 are covered, the T-type piston 14 into tank ontology is used for and applies pressure
Power, specific loading method are as follows: starting electro-hydraulic servo oil pressure pump 1, it is hydraulic to space injection between T-type piston 14 and sealing cover
Oil carries out raw coal sample 28 to cover pressure load.
High pressure water injection system includes high pressure water-injection pump 4, pond 6, mainly meets high pressure water injection requirement of experiment, and specifically it is logical
Piping is connect with water inlet 22, provides high-pressure water into tank ontology.
Vacuumize-gas injection system includes vacuum pump 9, pressure reducing valve 10, methane steel cylinder 11 and Ar steel cylinder, methane steel cylinder 11 and Ar
Steel cylinder is connect with air inlet, when needing to be passed through methane, cuts off the connection between Ar steel cylinder and air inlet, when needing to be passed through Ar
When, the connection between methane steel cylinder and air inlet is cut off, vacuum pump 9 is connected by respective line with experiment tank body 2, and is passed through
Pressure reducing valve 10 is connected with methane steel cylinder 11.
Data monitoring system includes computer 7 and data collector 8, data collector 8 respectively with mass flowmenter 3, pressure
Transmitter 17 is connected, while being connected with a data processing centre.The system realizes the related ginseng such as experimental pressure and flow
Several real-time monitorings and acquisition, high degree of automation, data acquisition are accurate.
Data collection system includes gas collecting apparatus 5 and mass flowmenter 3, and gas collecting apparatus is connect by pipeline with air inlet,
Air inflow is monitored by mass flowmenter 3, and is sent to the data collector 8 connecting with it.
For the ease of control ,-gas injection system, high pressure water injection system, can on the pipeline in data monitoring system be being vacuumized
Valve is set.
It is above-mentioned to be used in the high pressure water injection of raw coal containing gas and radial gas porous flow experimental method, it can be to the infiltration of raw coal sample
Saturating rate is measured, specific measuring method are as follows:
Step 1: installing raw coal sample 28 in tank ontology according to above-mentioned experimental system structure, and install T-type piston
14, and connect sealing cover body；Ar steel cylinder is opened, Ar is injected into tank ontology, using voltage stabilizing method checking test air-tightness；
Step 2: starting electro-hydraulic servo oil pressure pump 1, injects hydraulic oil to space between T-type piston 14 and sealing cover body, it is right
Raw coal sample 28 cover pressure load, calculates the carrying of raw coal sample by area ratio and covers pressure, corresponds to that coal seam is original to cover pressure；
Step 3: starting vacuum pump 9, is vacuumized, is then turned on methane steel cylinder 11 and pressure reducing valve 10 to high pressure tank body 2
Gas injection, and pressure constant state is kept, coal body equilibrium adsorption 8h；It is then turned off and vacuumizes-the valve of gas injection system；
Step 4: opening high pressure water-injection pump 4, is boosted (pressure value is higher than gas pressure in pressure pan body), open note
Water system valve carries out preset condition (constant pressure or constant current) water filling, and acquires number pressure at the injecting process water filling port and tank wall
According to, be observation water coal body it is macro-microscopical structure in migration rule, hybrid pigment in water；
Step 5: closing high pressure water injection system valve after completing the experiment of coal seam with gas high pressure water enchroachment (invasion), methane steel cylinder is opened
11 and the gas injection into tank ontology 2 of pressure reducing valve 10, and pressure constant state is kept, gas and water competitive Adsorption in coal body balance 8h；
Step 6: turn-on data monitoring system and data collection system, high pressure methane through 28 Radial Flow Through Porous Media of raw coal sample extremely
Floral tube 20 is filled the water, seepage flow initial stage is gas and water coexisting state, wait be full gaseity, and after gas flow stabilization, read test knot
Fruit calculates high pressure water enchroachment (invasion) raw coal containing gas permeability through following formula:
In formula: K is the permeability of coal sample, and mD, μ are gas viscosity, p0For the atmospheric pressure in laboratory, Pa；Q0For gas stream
Amount, ml/s；pw、peRespectively inner and outer boundary pressure, MPa；rw、reRespectively inner and outer boundary radius, cm；H is raw coal thickness, cm.
For the microcosmic adsorption swelling deformation of building high pressure water enchroachment (invasion) raw coal and macroscopical seepage flow coupling model, consider coal to inert gas
(Ar) low adsorption ability is based on above-mentioned experimental procedure, design: Ar (adsorbs different pressures in dry raw coal, dry raw coal containing gas
Power methane), high pressure water enchroachment (invasion) raw coal (different water enchroachment (invasion) pressure, without methane), high pressure water enchroachment (invasion) raw coal containing gas (different water enchroachment (invasion) pressure, watt
This pressure) and radial stable state of methane under the conditions of 5 classes such as high pressure water enchroachment (invasion) raw coal containing gas (different water enchroachment (invasion) pressure, gas pressure)
Seepage Experiment；KAr-PAr, KAr-P methane, KAr-P water, KAr-P methane and water, K methane-P methane and Shui Te in being tested
Levy curve.
It should be noted that any equivalent way that those skilled in the art are made under the introduction of this specification, or
Obvious variant should all be within the scope of the present invention.
Claims (4)
1. the measuring method of a kind of high pressure water injection of raw coal containing gas and radial gas permeation rate, which is characterized in that including following step
It is rapid:
Step 1: preparing experiment system, the experimental system includes experiment tank body, covers pressure loading system, high pressure water injection system, pumping
Vacuum-gas injection system, data monitoring system and data collection system, the experiment tank body includes tank ontology, in the tank ontology
Surrounding be provided with air inlet, water inlet, gas outlet and pressure transmitter interface, be provided with cyclic annular permeation in the tank ontology
Cylinder, the ring-type permeation cylinder is closely embedded in tank inner body wall, and communicates with the air inlet, places in the ring-type permeation cylinder
There is raw coal sample, platen is placed above the raw coal sample, T-type piston, the T-type piston top are installed above the platen
Install the sealing cover body for sealing to the tank ontology；The pressure loading system of covering is connect with the sealing cover body, the height
Pressure injection water system connect by pipeline with the water inlet, it is described vacuumize-gas injection system passes through pipeline and air inlet company
It connects, the pressure transmitter interface is connected to the data monitoring system；The data collection system includes gas collecting apparatus, described
Gas collecting apparatus is connect by pipeline with the gas outlet；
Step 2: by vacuumize-gas injection system injects Ar into the tank ontology, and turn-on data monitors system, and detection is real
The air-tightness of check system closes after air-tightness is good and vacuumizes-gas injection system；
Step 3: pressure loading system is covered in starting, the raw coal sample in cyclic annular permeation cylinder is carried out to cover pressure load, passes through area ratio meter
It calculates the carrying of raw coal sample and covers pressure, coal seam is original covers pressure for correspondence；
Step 4: starting vacuumizes-gas injection system, first tank ontology is vacuumized, then reinjects methane, and keep constant pressure
State, after raw coal sample equilibrium adsorption 8h, closing vacuumizes-gas injection system；
It fills the water Step 5: opening high pressure water injection system into tank ontology, after coal seam with gas high pressure water enchroachment (invasion) experiment to be done, closes
High pressure water injection system, open at this time vacuumize-gas injection system injects methane into tank ontology, and keeps pressure constant state, in the original
Gas and water competitive Adsorption in coal sample, balance 8h；
Step 6: turn-on data acquisition system, methane are to floral tube, seepage flow initial stage is filled the water through the raw coal sample Radial Flow Through Porous Media
Gas and water coexisting state, wait be full gaseity, and after gas flow stabilization, read test is as a result, calculate high pressure water according to formula (1)
Invade the permeability of the sample of raw coal containing gas:
In formula: K is the permeability of coal sample, and mD, μ are gas viscosity, p0For the atmospheric pressure in laboratory, Pa；Q0For gas flow,
ml/s；pw、peRespectively inner and outer boundary pressure, MPa；rw、reRespectively inner and outer boundary radius, cm；H is raw coal thickness, cm；
In step 1, the production method of the raw coal sample the following steps are included:
A is used as experiment coal sample along the cube coal sample that coal working face chooses certain size, and the experiment coal sample is cut into one
The column sample of scale cun, and polish its surface, water injection hole is drilled through from top to bottom at the column sample center,
Water filling floral tube is installed in the water injection hole, by two end part seals of the water filling floral tube；
The column sample for being installed on water filling floral tube is placed in cyclic annular permeation cylinder by b, pours water in the pedestal of cyclic annular permeation cylinder
Mud, installs permeability cell between its inner wall and column sample, and the permeability cell is by penetrating the support of cyclic annular permeation cylinder casing wall
Bar is fixed, joints cement in the gap formed to the cyclic annular permeation cylinder casing wall and the column sample, until covering sample
Until the certain thickness of top surface, platen is installed at the top of the column sample；
C after theing cement solidifies in cyclic annular permeation cylinder, by the support rod take out to get.
2. the measuring method of the high pressure water injection of raw coal containing gas according to claim 1 and radial gas permeation rate, feature
Be: the pressure loading system of covering includes electro-hydraulic servo control oil pressure pump, living to T-type by the electro-hydraulic servo control oil pressure pump
Plug applies pressure, to complete to cover pressure load to raw coal sample.
3. the measuring method of the high pressure water injection of raw coal containing gas according to claim 1 and radial gas permeation rate, feature
It is: is additionally provided with mass flowmenter on the pipeline connecting with the gas collecting apparatus, the data monitoring system includes computer
And data collector, the data collector pass through pressure transmitter interface and mass flowmenter described in connection.
4. the measuring method of the high pressure water injection of raw coal containing gas according to claim 1 and radial gas permeation rate, feature
Be: it is described vacuumize-gas injection system includes vacuum pump, pressure reducing valve, methane steel cylinder and Ar steel cylinder, the methane steel cylinder and Ar steel
Bottle is connected on the gas injection port by pipeline, and the vacuum pump and pressure reducing valve are installed in the pipe between methane steel cylinder and gas injection port
On road.
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| CN106932328B (en) * | 2017-05-16 | 2023-06-23 | 四川大学 | System and method for testing coal permeability by using trace gas |
| CN107101928A (en) * | 2017-05-27 | 2017-08-29 | 中煤科工集团重庆研究院有限公司 | A kind of non-linear device for testing permeability coefficient of coal petrography and method |
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| CN110646583B (en) * | 2019-10-09 | 2022-02-22 | 中煤科工集团重庆研究院有限公司 | Method and device for coal seam water injection similar simulation test |
| CN111272633B (en) * | 2020-03-09 | 2022-04-08 | 山东科技大学 | Test method for influencing permeability and wetting effect of coal seam by borehole deformation |
| CN112557275A (en) * | 2020-11-19 | 2021-03-26 | 河南能源化工集团研究总院有限公司 | In-situ radial testing method for coal seam permeability coefficient |
| CN112855089B (en) * | 2021-02-01 | 2021-11-30 | 重庆科技学院 | Application method for calculating effective permeability of two-dimensional sand-packed model |
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| CN101634621B (en) * | 2009-08-12 | 2011-05-25 | 重庆大学 | Fluid-solid-heat coupling triaxial servo percolation device for gas-contained coal |
| CN102830213B (en) * | 2012-08-10 | 2015-07-29 | 河南理工大学 | Stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under temperature match curing conditions |
| CN102979510B (en) * | 2012-12-05 | 2015-06-17 | 中国矿业大学 | Coal seam water injection displacement gas effect simulated experiment system |
| CN204116187U (en) * | 2014-09-28 | 2015-01-21 | 湖南科技大学 | A kind of raw coal for penetration testing is transparent builds part |
| CN104502251A (en) * | 2014-12-23 | 2015-04-08 | 黑龙江科技大学 | System and method for testing influence of external water invasion to gas-containing coal body seepage |
| CN105067494A (en) * | 2015-07-10 | 2015-11-18 | 中国矿业大学 | Permeability testing method and device based on radial percolation experiment |
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